Mist — PolyCreator example theme family

Reference for theme authors. A theme plugin is data-only: no JS, just
manifest.json + theme JSON files. This repo ships a family of two:

Make your own

1. Copy this repo (or start from two files — the shapes below are the whole contract).
2. Edit the colors. Only the 47 known tokens in @polycreator/plugin-manifest
   (THEME_TOKENS) take effect; unknown keys warn and are dropped.
   Values must be plain CSS color literals (#rrggbb, oklch(…), …) —
   no var() / url() / calc() / gradients.
3. Optional: metrics (radius 0–40px, blur 0–60px, alpha 0–100%),
   vibrancy: "default" | "none", extends (another theme id or
   builtin-light / builtin-dark; your own values win, a missing base
   degrades with a warning, never fatal).
4. Bump version in manifest.json, tag vX.Y.Z, push — the release
   workflow below packs the zip.

File layout contract

• manifest.json declares theme: { files } and no main.
  Up to 8 files per family; one bad file rejects the whole install.
• The file named theme.json keeps the plugin id — keep it primary so
  growing variants never moves the base id (extends targets and stored
  slot prefs keep resolving).
• Packing computes integrity (SHA-256 over [main?, nodeEntry?, ...theme.files?]
  in declaration order) and injects it into the manifest copy inside the zip.
  The desktop install gate recomputes and rejects drift.

Install

• In-app market (after registry listing), or
• Desktop: Settings → Plugins → From URL, paste the release zip URL, or
• Deep link: polycreator://install?url=<zip-url>